VUBMG102
76*'+
Danfoss – 7
2 Functional description
2�1 Heating
2�1�1 Primary supply temperature
The heating control in WM HPC allows a building to be maintained at a comfor-
table temperature. It controls one or more heat pumps that produce heat, and
can also start auxiliary heating when necessary. The primary supply is the pipe
that provides heat to the building’s radiators and other heat consumers.
The primary supply is maintained at a temperature that is based on the outdo-
or temperature. This temperature is measured and the desired primary supply
temperature is looked up in a curve. This curve must be adjusted to fit the tem-
perature needs of the specific building it is to control. The temperature that is
looked up is used as a set point for the integral control.
2�1�2 Integral control
The integral control decides whether the heat pump, or several heat pumps,
should run, and also if the auxiliary heater is needed. A heat pump can only
be either on or off, and will therefore produce too much or too little heat. The
goal for the control system is to produce just enough heat to keep the primary
supply temperature close to the set point.
The integral value is calculated by adding the difference between the primary
supply temperature and the set point to the integral every minute. The integral
Summary of Contents for DHP-R 7Ua
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Page 43: ...76 Danfoss 43 8 Menu overview...
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